This
book is a guide to the vascular plants of the Yellowstone and Grand Teton
national parks and the surrounding forest and wilderness areas, the
spectacular region known as the Greater Yellowstone Area. Vascular plants are
the plants best known to park visitors and include the ferns and fern allies
such as horsetails; gymnosperms such as pines, true firs, and spruces; and
plants having true flowers (angiosperms) such as lilies, grasses, and
roses.

While there are a number of references available on useful plants of the
West and the Rocky Mountains, none focuses specifically on the Greater
Yellowstone Area. This book draws from existing scientific and popular
literature, as well as the author’s personal observations and studies over
the past two decades.